dropping a rover from hexacopter

since it is quite hard to find the exact thing that i want , which is a detail information dropping system from UAV. I only manage to find two videos which is a bit similar and can be a reference when i design the dropping system

http://www.youtube.com/watch?v=7GRPMyGf1gA

Dropping a Rover from a HexaCopter

http://diydrones.com/profiles/blogs/dropping-a-rover-from-a-hexacopter

Dropping a Rover from Hexacopter - Part II

http://diydrones.com/profiles/blogs/dropping-a-rover-from-hexacopter-part-ii